Thule Circuit 526 Fork Mount Carrier AeroHead Low-Profile Reinforced Head combines aerodynamics, durability and style Lockable SecureSkewer for quick loading/unloading with additional security using Thules One-Key lock cylinder (sold separately) Tool-Free Universal Mounting makes it simple and easy to install D Shaped Low Profile Aluminum Tray made from corrosion-resistant aluminum to withstand the elements Integrated Wheel Cradle high wall design provides added protection and the perfect fit beneath your wheel